Name: Woodward 9905-003 SPM-A Automatic Synchronizer Module for Generator Voltage, Frequency & Phase Matching Control Systems
Brand: Woodward
SKU: 6317
Availability: InStock
Rating: 5.0 (1 reviews)

9905-003 9905-003 SPM-A

The Woodward 9905-003 is a highly reliable SPM-A Automatic Synchronizer Module, engineered to ensure safe and precise generator synchronization in industrial power systems. It plays a critical role in matching frequency, voltage, and phase angle between an offline generator and an energized bus or another generator before breaker closure.

Utilizing advanced phase-locked loop (PLL) control technology, the module automatically adjusts generator speed to achieve synchronization, minimizing mechanical stress and preventing electrical disturbances. Widely deployed in power plants, marine systems, and industrial energy networks, the 9905-003 is a trusted solution for stable and repeatable generator paralleling.

Technical Specifications

Specification	Details
Model	9905-003
Module Type	SPM-A Synchronizer Module
Function	Generator synchronization (frequency, voltage, phase matching)
Control Method	Phase-Locked Loop (PLL)
Input Voltage	115 / 230 VAC (±10%)
Frequency Range	50 / 60 Hz
Phase Matching Window	±10°
Voltage Matching Accuracy	Within 5%
Power Consumption	Approx. 5–10 W
Output Signals	Speed bias output, breaker close relay
Output Options	High impedance / Low impedance / EPG
Operating Modes	Run, Check, Permissive, Off
Operating Temperature	–40 °C to +70 °C
Mounting	Panel-mounted
Dimensions (L × W × H)	315 × 211 × 49 mm
Weight	1.75 kg
Status	Discontinued (legacy product, still supported in field)

Recommended Related Models

Woodward 9905-002N – SPM-A synchronizer variant
Woodward 9907-028 – Non-voltage matching synchronizer replacement
Woodward 9907-029 – Voltage matching synchronizer alternative
Woodward 8271-467 – Load sharing & speed control module
Woodward 2301 Series – Governor and load sharing systems

Popular Woodward Control Platforms

SPM-A Synchronizer Series
2301 Load Sharing & Speed Control Systems
EGCP Generator Control Systems
ProTech Overspeed Protection Series

Applications

The Woodward 9905-003 is widely used in applications requiring accurate generator synchronization and safe paralleling:

Utility and industrial power generation plants
Parallel generator and genset systems
Marine power management systems
Oil & gas turbine and compressor installations
Microgrid and distributed energy systems
Backup and emergency power synchronization

It ensures smooth breaker closure and stable grid connection, reducing transient shocks and protecting equipment.

Key Advantages

High-Precision Synchronization – Accurate matching of voltage, frequency, and phase
Automatic Speed Bias Control – Adjusts generator speed for seamless synchronization
Flexible Output Options – Compatible with various governor systems
Proven Industrial Reliability – Widely used in legacy and active installations
Reduced Electrical Stress – Prevents damaging transients during generator connection
User-Adjustable Dynamics – Adapts to different engine and turbine response characteristics

Technical FAQs

1. What is the main function of the 9905-003?
It synchronizes a generator to another generator or grid by matching voltage, frequency, and phase.

2. How does it achieve synchronization?
By adjusting generator speed using a PLL-based control loop.

3. What is the phase matching tolerance?
Approximately ±10 degrees.

4. What voltage does it operate on?
Typically 115 VAC or 230 VAC.

5. What happens after synchronization is achieved?
It sends a breaker close signal to connect the generator to the bus.

6. What are the physical dimensions?
About 315 × 211 × 49 mm.

7. What is the weight?
Approximately 1.75 kg.

8. Is this product still manufactured?
No, it has been officially obsoleted, but remains widely supported and available.

9. What systems is it compatible with?
Woodward 2301, EPG, and other governor/load sharing systems.

10. Why is synchronization important?
It prevents electrical faults, reduces mechanical stress, and ensures stable power system operation.

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Woodward 9905-003 SPM-A Automatic Synchronizer Module for Generator Voltage, Frequency & Phase Matching Control Systems